Which color of sputum is typically associated with chronic bronchitis?

Chronic bronchitis is a condition characterized by inflammation of the bronchial tubes, which leads to increased mucus production. The sputum typically produced by individuals with chronic bronchitis is often described as white or gray in color. This coloration indicates a thick mucus, as opposed to purulent (infected) sputum, which might be yellow or green. Over time, the sputum of someone with chronic bronchitis is typically not associated with significant amounts of bacteria, which would produce the more colorful sputum seen in acute infections.

In chronic bronchitis, the persistent cough and sputum production are primarily due to the irritation and inflammation caused by long-term exposure to irritants, such as tobacco smoke. This is why the sputum is usually clear or white/gray rather than having the more brightly colored hues that would suggest an acute bacterial infection. The bright red sputum is generally associated with conditions like pulmonary hemorrhage or tuberculosis, while yellow and green sputum can indicate more acute infections such as pneumonia or bronchiectasis.